Also known as Dammarenediol 12-hydroxylase (Cytochrome P450 CYP716A47) (Protopanaxadiol synthase) (PgDDS).Catalyzes the hydroxylation of dammarenediol-II at the C-12 position to yield protopanaxadiol in ginsenoside biosynthesis, a class of tetracyclic triterpenoid saponins.